:root {
    --primary: #ff6b35;
    --primary-dark: #e2551f;
    --dark: #1f2937;
    --gray: #6b7280;
    --light-gray: #f3f4f6;
    --border: #e5e7eb;
    --white: #ffffff;
    --success: #16a34a;
    --danger: #dc2626;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', Roboto, -apple-system, sans-serif;
    background: #fafafa;
    color: var(--dark);
    line-height: 1.5;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Header ---------- */
.topbar {
    background: var(--dark);
    color: #d1d5db;
    font-size: 13px;
    padding: 6px 0;
}
.topbar .container { display: flex; justify-content: space-between; }

.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    padding-bottom: 14px;
    gap: 20px;
    flex-wrap: wrap;
}
.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    white-space: nowrap;
}
.logo span { color: var(--dark); }

.search-form {
    flex: 1;
    display: flex;
    max-width: 500px;
}
.search-form input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    font-size: 14px;
}
.search-form button {
    padding: 10px 18px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
}
.search-form button:hover { background: var(--primary-dark); }

.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a {
    font-weight: 500;
    font-size: 14.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-links a:hover { color: var(--primary); }
.cart-badge {
    background: var(--primary);
    color: white;
    font-size: 11px;
    border-radius: 50%;
    padding: 1px 6px;
    margin-left: 2px;
}

.category-bar {
    background: var(--white);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.category-bar ul { display: flex; gap: 24px; padding: 10px 0; flex-wrap: wrap; }
.category-bar a { font-size: 14px; color: var(--gray); }
.category-bar a:hover, .category-bar a.active { color: var(--primary); font-weight: 600; }

/* ---------- Hero ---------- */
.hero {
    background: linear-gradient(120deg, #ff6b35, #ff9068);
    color: white;
    padding: 50px 0;
    margin-bottom: 30px;
}
.hero h1 { font-size: 32px; margin-bottom: 10px; }
.hero p { font-size: 16px; opacity: .95; margin-bottom: 20px; }
.hero .btn { background: white; color: var(--primary-dark); font-weight: 700; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--radius);
    border: none;
    background: var(--primary);
    color: white;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: background .15s;
}
.btn:hover { background: var(--primary-dark); }
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: white; }
.btn-dark { background: var(--dark); }
.btn-dark:hover { background: #111827; }
.btn-danger { background: var(--danger); }
.btn-block { width: 100%; text-align: center; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------- Section titles ---------- */
.section-title {
    font-size: 22px;
    font-weight: 700;
    margin: 30px 0 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.section-title::before {
    content: '';
    width: 5px;
    height: 22px;
    background: var(--primary);
    border-radius: 3px;
}

/* ---------- Product grid ---------- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}
.product-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform .15s, box-shadow .15s;
    display: flex;
    flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(0,0,0,.1); }
.product-card .img-wrap {
    height: 180px;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}
.product-card .img-wrap img { height: 100%; object-fit: cover; }
.discount-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--danger);
    color: white;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
}
.product-info { padding: 14px; flex: 1; display: flex; flex-direction: column; }
.product-info h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.product-info .cat { font-size: 12px; color: var(--gray); margin-bottom: 8px; }
.price-row { display: flex; align-items: baseline; gap: 8px; margin-bottom: 10px; }
.price-now { font-size: 17px; font-weight: 700; color: var(--dark); }
.price-old { font-size: 13px; color: var(--gray); text-decoration: line-through; }
.product-info .btn { margin-top: auto; }
.stock-low { color: var(--danger); font-size: 12px; font-weight: 600; }

/* ---------- Product detail ---------- */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: white;
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 30px 0;
}
.product-detail .img-wrap {
    background: var(--light-gray);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 400px;
    overflow: hidden;
}
.product-detail .img-wrap img { height: 100%; object-fit: cover; }
.product-detail h1 { font-size: 26px; margin-bottom: 10px; }
.product-detail .price-now { font-size: 28px; }
.qty-selector { display: flex; align-items: center; gap: 10px; margin: 20px 0; }
.qty-selector input {
    width: 60px; text-align: center; padding: 8px; border: 1px solid var(--border); border-radius: var(--radius);
}
.qty-selector button {
    width: 36px; height: 36px; border: 1px solid var(--border); background: white; border-radius: var(--radius); cursor: pointer; font-size: 16px;
}

/* ---------- Cart ---------- */
.cart-table { width: 100%; background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border-collapse: collapse; }
.cart-table th, .cart-table td { padding: 14px; text-align: left; border-bottom: 1px solid var(--border); }
.cart-table th { background: var(--light-gray); font-size: 13px; text-transform: uppercase; color: var(--gray); }
.cart-item-info { display: flex; align-items: center; gap: 14px; }
.cart-item-info img { width: 60px; height: 60px; object-fit: cover; border-radius: 6px; background: var(--light-gray); }
.cart-qty-input { width: 60px; padding: 6px; border: 1px solid var(--border); border-radius: 6px; text-align: center; }
.cart-summary {
    background: white; padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow);
    max-width: 350px; margin-left: auto; margin-top: 20px;
}
.cart-summary .row { display: flex; justify-content: space-between; margin-bottom: 10px; font-size: 14.5px; }
.cart-summary .total-row { font-size: 18px; font-weight: 700; border-top: 1px solid var(--border); padding-top: 12px; margin-top: 12px; }

/* ---------- Forms ---------- */
.form-card {
    background: white; max-width: 480px; margin: 40px auto; padding: 30px;
    border-radius: var(--radius); box-shadow: var(--shadow);
}
.form-card h2 { margin-bottom: 20px; font-size: 22px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-footer { margin-top: 16px; font-size: 14px; text-align: center; color: var(--gray); }

.alert {
    padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px;
}
.alert-error { background: #fee2e2; color: var(--danger); border: 1px solid #fecaca; }
.alert-success { background: #dcfce7; color: var(--success); border: 1px solid #bbf7d0; }

/* ---------- Checkout / Orders ---------- */
.checkout-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; margin: 30px 0; }
.card-box { background: white; padding: 24px; border-radius: var(--radius); box-shadow: var(--shadow); }
.order-item-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 14px; }

.badge { padding: 4px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-processing { background: #dbeafe; color: #1e40af; }
.badge-shipped { background: #e0e7ff; color: #4338ca; }
.badge-delivered { background: #dcfce7; color: #166534; }
.badge-cancelled { background: #fee2e2; color: #991b1b; }

/* ---------- Footer ---------- */
footer {
    background: var(--dark);
    color: #d1d5db;
    margin-top: 60px;
    padding: 40px 0 20px;
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 30px; }
.footer-grid h4 { color: white; margin-bottom: 14px; font-size: 15px; }
.footer-grid li { margin-bottom: 8px; font-size: 13.5px; }
.footer-grid a:hover { color: var(--primary); }
.footer-bottom { text-align: center; padding-top: 20px; margin-top: 20px; border-top: 1px solid #374151; font-size: 13px; color: #9ca3af; }

/* ---------- Admin ---------- */
.admin-wrapper { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 230px; background: var(--dark); color: white; padding: 20px 0; flex-shrink: 0;
}
.admin-sidebar .logo { color: white; padding: 0 20px 20px; font-size: 20px; border-bottom: 1px solid #374151; margin-bottom: 10px;}
.admin-sidebar a {
    display: block; padding: 12px 20px; color: #d1d5db; font-size: 14.5px;
}
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--primary); color: white; }
.admin-content { flex: 1; padding: 30px; }
.admin-topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card { background: white; padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow); }
.stat-card .num { font-size: 26px; font-weight: 700; }
.stat-card .label { color: var(--gray); font-size: 13px; }
.admin-table { width: 100%; background: white; border-collapse: collapse; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.admin-table th, .admin-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
.admin-table th { background: var(--light-gray); font-size: 12.5px; text-transform: uppercase; color: var(--gray); }
.action-links a { margin-right: 10px; font-size: 13px; font-weight: 600; }
.action-links .edit { color: #2563eb; }
.action-links .delete { color: var(--danger); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--gray); }
.empty-state h3 { margin-bottom: 10px; color: var(--dark); }

@media (max-width: 768px) {
    .product-detail { grid-template-columns: 1fr; }
    .checkout-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .admin-wrapper { flex-direction: column; }
    .admin-sidebar { width: 100%; }
}